Abstract: The processes of embryology of Ulmus pumila L. were observed by serial paraffin sections and under optical microscope. The results are as follows: the anther wall of U.pumila L. includes 4 layers; the cytoplasmic division of microspore mother cells during meiosis was simultaneous; the tetrad of microspores resulted from the meiosis are simultaneously bilateral and tetrahedral;mature pollen grains are two-cell type. The development of the anther wall belongs to a dicotyledonous type. Tapetum belongs to glandular tapetum. The ovary consists of 2 carpels with a single locule,parietal placenta,anatropous ovule,double integument,and thick nucellus. The tetrad of megaspores is linear or T-type in arrangement.Embryo sac of U.pumila L. is of single-spore polygonum type. The embryogenesis of U.pumila L. conformed to the So-lanad type; karyotype endosperm; cotyledon embryo without endosperm.